03/04/22

Chem 101 Homework 9: Rate Laws Question 6
The second order reaction A → Products takes 13.5 s for the concentration of A to decrease from 0.740 M to 0.289 M. What is the value of k for this reaction?Answer=______M⁻¹s⁻¹
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03/04/22

Chem 101 Homework 9: Rate Laws Question 4

Consider the radioisotope ²²⁶Ra (half life = 1.60 × 10³ years). What is the first order rate constant for ²²⁶Ra?Answer= ______1/years
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03/04/22

Chem 101 Homework 8: Kinetics Question 5.f

Data is collected for the gas phase reaction 2 A + B + 3 C → Products at 470 K. Use the rate law Rate = k[B]²[C]. What is the value of the rate constant at 470 K for this reaction?
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03/04/22

What's the correct answer to this?
Are any of these equations redox reactions? if so what are their reducing and oxidizing agents?CuSO4(aq)+Zn(s)→ZnSO4(aq)+Cu(s)HCl(aq)+NH3(aq)→NH4Cl(aq)2Ca(s)+O2(g)→2CaO(s)
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03/04/22

At equilibrium a 2.0L reaction vessel contained a mixture of 1.2 mol fe, 1x10^-3 mol O2 and 2 mol of fe2o3 at 2000°c. What are the values of kc and kp for this reaction
4Fe (s) + 3O2 (g) = 2Fe2O3 (s)
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03/04/22

Help dont understand
Complete and balance each of the following equations for acid-base reactions.Part A.HCl(aq)+Ba(OH)2(aq)→Part B.H2SO4(aq)+KOH(aq)→Part C.HClO4(aq)+NaOH(aq)→
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03/04/22

If Kc = 0.0096 for the reaction below at 298.0 K, then what is the value of Kp? (R = 0.0821 L･atm/mol･K.) 3 A (g) + B (g) ⇌ C (g) + D (g)
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03/04/22

The value of Kp for the reaction 2 A(g) + B(g) + 3 C(g) → 2 D(g) + E(g) is 14970 at a particular temperature. What would be the value of Kp for the reaction 6 A(g) + 3 B(g) + 9 C(g) →6 D(g) + 3 E(g)?
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03/03/22

Whats the answer??
Are any of these equations redox reactions? if so what are their reducing and oxidizing agents?7O2(g)+2CH3CH3(g)→4CO2(g)+6H2O(g)HSO-4(aq)+OH-(aq)→SO42-(aq)+H2O(l)Fe(s)+CuSO4→FeSO4(aq)+Cu(s)
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03/03/22

Consider this aqueous reaction. HNO3(aq)+Ba(OH)2(aq)⟶ What is the formula for the salt that forms?
Consider this aqueous reaction. HNO3(aq)+Ba(OH)2(aq)⟶ What is the formula for the salt that forms?
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03/03/22

Rate of Rxn Question
CH3CH3(g) + 2H2O(g) + Ni(s) -> 2CO(g) + 5H2(g) + Ni(s) ∆H= +300 kJ/mol(a)Wh‎at is the e‎ffect on the r‎ate of reac‎tion wh‎en the Ni is rem‎oved?(b) If the rea‎ction was do‎ne in a 10‎00 mL... more
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03/03/22

The solubility of potassium chloride (KCl) is 34.0 g per 100.0 g of water at about 20°C. How many grams of potassium chloride will dissolve in 56.6 g of water at 20°C to the nearest 0.1 g?
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03/03/22

How to solve using Stoichiometry

How many moles of ammonia would be required to react exactly with 0.470 moles of copper(II) oxide in the following chemical reaction? 2 NH₃(g) + 3 CuO(s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)
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03/03/22

Indicate which member of the pair you would expect to have the higher boiling point.
HCl or I2 CH3F or CH3OH H2O or H2S SiO2 or SO2
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03/02/22

if 15kg of Al2O3, 53.4kg of NaOH and 53.4kg of HF react completely, how many kg of cryolite will be produced and what is the mass of excess reactants after the reaction
(question #35)
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03/02/22

Reverse Reaction Question
2H2‎S(g) + CH4‎(g) <->  4H2‎(g) + CS2(g) Kc = 5.2‎7 * 10-8 at 973 KWhic‎h mo‎lecule/s are fa‎vorably form‎ed at 973K ? a.C‎H4(g) + CS‎2(gb.H2S(g) + CH4(gc. H2(g) + CS2(gd.H2S(g) + ... more
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03/02/22

Dynamic Equilibrium Problems

2H‎2S(g) + C‎H4(g) ->  4H‎2(g) + CS‎2(g) Kc= 5.2‎7 * 10-8 at 973 KWrit‎e the Kc expres‎sion for the equ‎ation aboveWhat is K‎c for form‎ation of one m‎ole of H2S(g)  at... more
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03/02/22

help me answer this problem?
The dye molecule 7-aminocoumarin has an extinction coefficient of 3,200M-1cm-1 at 432nm. An aqueous sample of 7-aminocoumarin is placed in a cuvette with a 1.00cm path length and the absorbance is... more
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03/02/22

Solutions of silver nitrate and aluminum iodide are mixed together, forming solid silver iodide and aqueous aluminum nitrate. formula equation:
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03/01/22

entalphy chemistry
The specific heat capacity of silver is 0.235 J/g ∙ K. Its melting point is 962 °C, and its enthalpy of fusion is 11.3 kJ/mol. What quantity of energy, in joules, is required to change 9.70 g of... more
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03/01/22

If 25.6 mL of the barium hydroxide solution was needed to neutralize a 6.12 mL aliquot of the perchloric acid solution, what is the concentration of the acid?
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02/28/22

A certain mass of an unknown third period metal hydroxide reacts with an certain volume and concentration of a diprotic acid. How do I figure out the identity of the metal?
I used dimensional analysis and the molarity of the acid to find the moles of the acid, then multiplied it by the 1:2 stoichiometric ratio since it's a diprotic acid. This gave me the moles of the... more
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02/28/22

Chemistry Stoichiometry
PCl5 + 4 H2O → 5 HCl + H3PO4 a) How many moles of phosphorus pentachloride are needed to react with 235 g of water?b) How many grams of H3PO4 will be produced in a reaction that forms 62.7 g of HCl?
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02/28/22

Hi, I need help with my chem 22 homework

What is the percent by weight (w/w%) of sugar in soda? Assume the average mass of sugar in soda is 29.0 g and the total mass is 370.0 g.
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02/28/22

What types of intermolecular forces would occur in each of the following
(CH3)2NHSO2BrFCH3CF3HBrKCl
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